<template>
  <div class="permission-container">
    <div class="app-container">
      <!-- 表格 -->
      <el-card>
        <div style="text-align: right; margin-bottom: 20px">
          <el-button type="primary" size="small" @click="hAdd(1,'0')">添加权限</el-button>
        </div>
        <el-table border :data="list" row-key="id">
          <el-table-column label="名称" prop="name" />
          <el-table-column label="标识" prop="code" />
          <el-table-column label="描述" prop="description" />
          <el-table-column label="操作">
            <template slot-scope="{row}">
              <el-button v-if="row.type===1" type="text" @click="hAdd(2,row.id)">添加</el-button>
              <el-button type="text" @click="hEdit(row.id)">编辑</el-button>
              <el-button type="text" @click="hDel(row.id)">删除</el-button>
            </template>
          </el-table-column>
        </el-table>
      </el-card>
      <el-dialog
        :visible.sync="showDialog"
        :title="isEdit? '编辑' : '添加'"
        :close-on-click-modal="false"
        :close-on-press-escape="false"
        @close="resetForm"
      >
        <!-- 表单内容 -->
        <el-form ref="form" label-width="100px" :model="formData" :rules="rules">
          <el-form-item label="权限名称" prop="name">
            <el-input v-model.trim="formData.name" />
          </el-form-item>
          <el-form-item label="权限标识" prop="code">
            <el-input v-model.trim="formData.code" />
          </el-form-item>
          <el-form-item label="权限描述" prop="description">
            <el-input v-model="formData.description" />
          </el-form-item>
          <el-form-item label="权限启用">
            <el-switch
              v-model="formData.enVisible"
              active-text="启用"
              active-value="1"
              inactive-text="不启用"
              inactive-value="0"
            />
          </el-form-item>
        </el-form>

        <template #footer>
          <div style="text-align: right;">
            <el-button @click="showDialog = false">取消</el-button>
            <el-button type="primary" @click="hSubmit">确定</el-button>
          </div>
        </template>
      </el-dialog>
    </div>
  </div>
</template>
<script>
import { addPermission, delPermission, getPermissionDetail, getPermissionList, updatePermission } from '@/api/permisson'
import { tranListToTreeData } from '@/utils'

export default {
  name: 'Permission',
  data() {
    const validCode = (rule, value, callback) => {
      // 添加时的校验：code不能重复
      let existCodeList = this.originList
      if (this.isEdit) {
        // 编辑时的校验: code能取自己
        existCodeList = this.originList.filter(item => item.id !== this.formData.id)
      }
      existCodeList.map(it => it.code).includes(value)
        ? callback(new Error(value + '已经占用'))
        : callback()
    }
    const validName = (rule, value, callback) => {
      // 添加时的校验： 名字不能取子元素的名字
      let existNameList = this.originList.filter(item => item.pid === this.formData.pid)
      if (this.isEdit) {
        // 编辑时的校验： 名字不能取兄弟（排除自己）的名字
        // 找兄弟，排除自己
        existNameList = this.originList.filter(item => item.pid === this.formData.pid && item.id !== this.formData.id)
      }
      existNameList.map(it => it.name).includes(value)
        ? callback(new Error(value + '已经占用'))
        : callback()
    }
    return {
      list: [],
      originList: [], // 在做校验时需要用到的数据
      showDialog: false,
      isEdit: false,
      formData: {
        name: '',
        code: '',
        description: '',
        enVisible: ''
      },
      rules: {
        code: [{ message: '不能为空', required: true, trigger: 'blur' }, { validator: validCode, trigger: 'blur' }],
        name: [{ message: '不能为空', required: true, trigger: 'blur' }, { validator: validName, trigger: 'blur' }]
      }
    }
  },
  created() {
    this.loadPermissionList()
  },
  methods: {
    async loadPermissionList() {
      try {
        const res = await getPermissionList()
        console.log('从后端获取的数据的是', res)
        this.originList = res.data.map(({ id, pid, name, code }) => ({ id, pid, name: name.trim(), code }))
        // console.log(this.originList)
        this.list = tranListToTreeData(res.data)
      } catch (error) {
        console.log(error)
      }
    },
    hAdd(type, id) {
      this.isEdit = false
      this.showDialog = true
      // 记录当前添加的关键信息
      this.formData.type = type
      this.formData.pid = id
    },
    // 用户点击确定
    hSubmit() {
      this.$refs.form.validate(valid => {
        if (valid) {
          this.isEdit ? this.doEdit() : this.doAdd()
        }
      })
    },
    async doAdd() {
      try {
        const res = await addPermission(this.formData)
        console.log(res)

        this.showDialog = false
        this.loadPermissionList()
        this.$message.success('添加成功')
      } catch (err) {
        console.log(err)
        this.$message.error('添加失败')
      }
    },
    async doDel(id) {
      try {
        const res = await delPermission(id)
        console.log(res)

        this.loadPermissionList()
        this.$message.success('删除成功')
      } catch (err) {
        console.log(err)
        this.$message.error('删除失败')
      }
    },
    // 用户点击删除
    hDel(id) {
    // alert(id)
      this.$confirm('你确定要删除吗？').then(() => {
        this.doDel(id)
      }).catch(() => {

      })
    },
    // 用户点击编辑
    async hEdit(id) {
      this.isEdit = true
      const res = await getPermissionDetail(id)
      console.log(res, '权限点详情数据')
      this.formData = res.data
      this.showDialog = true
    },
    async doEdit() {
      try {
        const res = await updatePermission(this.formData)
        console.log(res, '修改数据返回')
        this.showDialog = false
        this.loadPermissionList()
        this.$message.success('修改成功')
      } catch (error) {
        console.log(error)
        this.$message.error('修改失败')
      }
    },
    // 当弹层关闭时，重置表单
    resetForm() {
      // 1. 重置表单
      this.formData = {
        name: '', // 名称
        code: '', // 权限标识
        description: '', // 描述
        enVisible: '0', // 开启
        pid: '', // 添加到哪个节点下
        type: '' // 类型
      }
      // 2. 清空校验
      this.$refs.form.resetFields()
    }
  }
}
</script>
